Their pricing model is slightly complicated. Basically nothing is free - every single map load is charged, for dynamic maps (what I'm using) starting at $7 per thousand. BUT you get $200 free credit per month, which means the first 28000 map loads per month are free.

A map load is a load of the Maps API on a page, so in DataFlex terms that means one for each time your application is loaded. Once loaded you can show the maps and use the map as much as you want for free.

Don't know about you, but I don't have any applications that are loaded more than 28000 times per month, and if I had, I'm sure I could pay a few dollars for the service.

You can read all the details here: